import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
main() {
  print("1");
  var file = File("./aa.txt");
  file.writeAsStringSync("1111",flush: true);
  file.readAsString().then((String value){print("111");});
  file.readAsString().then((var value)=>print("111"));
  file.readAsString().then((var value)=>print("111"));
}

Future getStr1() async {
  ComponentElement e;
  ComponentElement ss;
  RenderBox box;
  Text t;
  return "11";
}

FutureOr onValue(String value) {
  print(value);
}
